First and foremost, have fun.
I don't think there's any particular chess preparation you need to do. Maybe just do a bit more puzzles close to the tournament and review your opening lines. Other than that, make sure you are well rested during the tournament and eat healthy, that's more important than you might think.
As far as the etiquette is concerned, just being polite and civil will take care of most of it. Shake hands before and after the game (that is not optional). Saying good luck is totally fine. Having a drink at the board is perfectly fine too. Food is a bit of a grey area, but as long as it is not smelly and you do not make noise eating it, it should be Okay (I wouldn't bring a pack of crisps or anything that makes noise and can distract your opponent, but a banana, for a example, would be not be a problem).
And make sure you are familiar with OTB specific rules, like touch move, use of the clock, writing down your moves on the score sheet, etc.
Signed up for my first ever face to face tournament. It'll be 60+30. I’ve only ever played online (around 1500+ rapid), so I'm not sure what to expect. My concerns are 2-fold.
1. Chess related - how does one prep? As someone who mainly plays blitz and bullet, I tried playing more rapid recently so I have more time to think. I notice that I often give up calculating after a couple of moves/what my opponent will think, which is why I prefer slower time controls. Should I do more puzzles? How should I pace my moves? I usually go for a London as white and KID as black, should I blitz out the opening and take more time during the middlegame? Any and all tips are welcome.
2. Non-chess related - For anyone who's ever played in OTB tournaments, can you drop your best rookie survival tips? Should I bring food? Is it bad manners to have coffee while playing? Is it ok to say good luck or is it like theatre where it's bad juju to do that?
Thanks in advance!